SV08 MAX Bed Heater overtemp

Sovol SV08 MAX
1

Just finished setting up my SV08 MAX and a few times the bed gets too hot, and the printer has done an emergency shutdown at 110C.

At first, I thought it was due to printing ASA with a desired temperature of 100C. However, I was printing PLA yesterday and pre-heated the bed to 65C, but the filament wanted 55C, so the heater controller was using 0% power to reduce the bed temp, but my power monitor said the printer was consuming 1200W and the bed temp was climbing over 72C. Even when I set the desired temp to 0C the heater kept running (though it said 0%). After I powered off the printer and restarted it, it worked normally.

Has anyone else had this problem? Is there a PID setting I can adjust to fix this, or to I need to ask support to send me a new bed heater board?

Thanks – Bob

2

Email Sovol at info@sovol3d.com
Explaining your issue, if you didn’t buy from Sovol you might have to deal with wherever you bought it from.

3

The bed heater on the Max is on line voltage. If the controller shorts to permanently on then the mcu is helpless to stop bed heating.

There is most likely a one shot thermal fuse next to the bed thermistor to kill it at some point (125 °C???) to prevent complete meltdown. Thermal fuses like that are not typically considered “user serviceable”.